Hi all, my speedo clock has stopped working so easiest fix is replace the unit £££££. cheaper option is opening the housing and replacing the speedo clock. My question is how to open it up and replace. The speedo cable has been replaced as the previous one snapped, drive gear has been checked and is turning the cable so guess its the speedo clock. Any help gratefully appreciated. My bike is a 1500gl 1992. Would older/younger models fit as well?